While the headquarters have been south of downtown Seattle for years. Boeing is actually a Delaware corporation... tax reasons. Over the years Boeing has expanded by merging and buying other companies. Acquistions included North American Rockwell (space shuttle), Hughes (satellites) and the merger with McDonald Douglas. While Seattle employees may be disappointed the employees in St. Louis, Dallas, Anaheim, Wichita, Coco Beach, etc are probably cheering and saying it is about time.